Safety razor



Oct. 12 1926.

T. HOFFMAN SAFETY RAZOR IFiled oct. 28, 1925 Illa' "ffl INVENTOR hwlnvb-Hggmoxx,

ATTORNEY 66 of the Patented Oct. 12, 1926.

THEODORE HOFFMAN, F BROOKLYN, NEW YORK.

SAFETY RAZOR.

Application led October 28, 1925. Serial No. 65,411.

This invention relates more particularly to a class of shaving devices for persons.

My invention has for its object primarily to provide a safety razor designed to be employed especially by persons for shaving, and which is of a form whereby the cutting process of hair is accomplished on 'slants or in oblique directions in a manner so that the shave will be smooth without tending to pull l0 the beard and irritate the skin as is incident to safety razors of forms requiring the movement for the shaving action to be on direct lines to the cutting edges of their blades with the attendant annoyance so common to the use of such types of razors especially When the blades are even slightly dulled. The invention resides mainly in the provision of a razor having a blade with polygonal cutting edges, and adjacent each cutting edge of the blade is a row of spaced guard teeth includingr two sets disposed in opposite oblique directions to the center of thecontiguous edge of the blade for causing during the process of shaving the feeding of the hair to the blade of one set of teeth to one side of a median line and to cause the feeding of the other set of the teeth to the opposite side of said line so that the cutting action of the blade will be in a sidewise di- 3" rection 4instead of the hair being cut by a direct movement of the razor.

Another object of the invention is to dispose the teeth of all the rows on corresponding downward inclines from the blade and to form the teeth also with upper beveled faces for enabling the blade and teeth to be effectively guided into contact with the skin of the person w'hen shaving.

l.A further object of the invention is to provide a safety razor of a simple, efficient and durable construction which may be made in appropriate sizes.

With these and other objects in View, the invention will be hereinafter more fully exlained with reference to the accompanying drawing forming a part of this specification in which similar characters of reference indicate corresponding parts in all the views, and will then be pointed out in the claims at the end of the description.

In the drawing, Figure 1 is an elevation of one form of a safety razor embodying my invention.

Fig. 2 illustrates views showing a top plan guard plate, a plan of the cutting blade and a top plan of the clamping plate used in the razor.

Fig. 3 is a sectional view taken on the line 3-3 of the guard plate shown in Fig. 2, and

Fig. 4 is an enlarged fragmentary sectional view taken on the line 4-4 of Fig. 1.

The razor has a guard plate 10 which may be of an appropriate polygonal shape of a suitable size, though the form of the guard plate illustrated is substantially square. The underside and upper face of the guard plate is preferably formed into somewhat an extended cone-shape to provide four inclined upper' surfaces, as 11, 12, 13, 14, between the corners of the plate, and the apex of the upper face is cut away or iattened, as at 15, also in approximately a square shape. In the center of theiat surface 15 of the guard plate is an opening 16, and through the guard plate at each 'corner of the flat surface is an orifice 17. Extending from the underside of the guard plate 10 surrounding its opening 16 may be a sleeve 18. Protruding from the edges of the guard plate 10 are rows of corresponding teeth 19, 20, 21, 22, all disposed on downward inclines similar to the inclines ofthe 13, 14. and the teeth of each row includes two sets 23, 24 disposed in opposite obli ue directions from the center of the row. T e upper faces of the teeth of each row are beveled, as at 25, toward their free ends, preferably on inclines approximately equivalent to forty-five degrees for enabling the skin of the person using the razor to be effectually contacted and to cause the hair or beard to be fed from both directions toward a median line, as will be hereinafter more fully explained.

On top of the cone-shaped guard plate 10 is a removable razor blade 26 which is of a polygonal or substantially square shape, and this blade is of such a dimension that as clamped on the guard plate its four cutting edges terminate very close to the upper edges of the beveled faces 25 of the teeth of the guard plate. The cutting blade is of thin sheet steel, and through the center of the blade is an opening 27 which is in register with the opening 16 of the guard plate. In the parts of the cutting blade corresponding to the corners of the Hat surface 15 of the guard plate 10 are four orifices 28 which are in register with the orifices 17 of the guard plate. In the cutting blade 26 and extendupper surfaces 11, 12,

ing from the orifices 28 to its corners are slots, as 29, and the portions of the blade between these slots conform approximately to the shapes of the upper surfaces11, 12, 13, 14 of the guard plate. The provision of the slots 29 and the orifices 28 enables the blade to be flexed to lie closely upon the surfaces of the guard plate,'and the blade is removably clamped upon the guard plate-by means of a clamping plate, as .30, and a handle 31.

The clamping plate 3() is of a polygonal or,substantiallyisquare shape as well as be-' ing of an extended, cone-shape somewhat similar to the cone-shaped guard plate. The clamping plate is disposed upon the cutting blade 26, and this clamping plate is of a size so that its edges terminate at or nearly to the cutting edge of the blade. Projecting from the central part of the underside of the clamping plate 30 is a threaded post 32 which is removably inserted through the opening 27 of the cutting blade and through the opening 16 and sleeve 18 of the toothed guard plate 10, and this threaded post is of a length so that its free end part protrudes beyond the sleeve. Also projecting from the underside of the clamping plate 30 may be four spaced lugs or pins 33 which are removably disposed through the orifices 28 of the cutting blade and orifices 17 of the guard plate for serving to prevent the blade from rotatively shifting on the post 32 and on the guard plate.

rlhe handle 31 may be of any desired shape and size, though the handle illustrated is of a well known form having in its upper end a socket 34 in which the threaded end of the post 32 is screwed, and this socket is of a length to permit the handle to be rotated into close engagement with the sleeve 18 of the guard plate 10 for causing the cutting bla-de to be tightly held removably between the clamping plate and guard plate.

The razor as thus formed isA employed in the manner common to the use of safety razors of ordinary types for shaving and during the shaving process the beveled sets of teeth of each row of the guard plate will cause the feeding of the hair to the cuttingv blade from one set of teeth to one side of the median line of the adjacent cutting edge of the blade and causethe feeding of the hairto the cutting blade from the other setof teeth to the opposite side of the median line, in order that the cutting movement will be accomplished on slants or in oblique direc tions instead of the cutting action being on direct lines for acquiring a clean effective.

shaving without liability of pulling the beard and irritating the skin.

ln the foregoing description, l have embodied the preferred form of my invention, but l do not wish to be understood as limiting myself thereto as l am aware that modifications may be'made therein without depart-ing from 'the principle o'r sacrificing any of the advantages of this invention, therefore, I reservevto myself the right to make such changes as fairly fall within the scope thereof.

Having thus described my invention, li claim as new and desire to secure by Letters Patent l. In a razor having a polygonal blade provided with cutting edges, a row of protruding spaced teeth adjacent each cutting edge of the blade, the teeth of each row including two sets disposed in opposite oblique directions to the center of the contiguous edge of the blade for causing the feeding of one set of the teeth to one side of a median line and the feeding of the other set of the teeth to the opposite side of said line.

2. ln a razor having a polygonal blade provided with cut-ting edges, a row of protruding spaced teeth adjacent each cutting edge of the blade, the teeth of all the rows disposed on corresponding downward inclines with their upper faces beveled on approximately forty-five degree angles and the teeth of each row including two sets disposed in opposite oblique directions to the center of the contiguous edge of the blade for causing the feeding of one set of the teeth to one side of a median line and the feeding of the other set of the teeth to the opposite side of said line..

3. 1n a razor having a polygonal blade provided with cutting edges, a polygonal guard plate supporting the blade and having on each of lts edges protruding spaced teeth adjacent each cutting edge of the blade, the teeth of each row including two sets disposed in opposite oblique directions to the center of the eontiguousvedge of the blade for causing the feeding of one set of the teeth to one side of a median line and the feeding of the other set of teeth to the opposite side of said line, means for clamping the blade on the guard plate, and a removable handle co-operating with said means for maliing the clamping of the blade effective.

t. lira razor having a polygonal blade provided with cutting edges, a polygonal guard plate supporting the blade and having on each of its edges protruding spaced teeth adjacent each cutting edge of the blade, the teeth of all the rows disposed on corresponding downward inclines with their upper faces leveled on inclines approximately forty-ve degree angles and the teeth of each row including two sets disposed in opposite oblique directions to the center of the contiguous edge of the blade for causing the feeding of one set of the teeth to one side of a medial line and the feeding of the other set of the teeth to the opposite side of said line, means for clamping the blade on the guard plate, and a removable handle co-operating with said means for makingl the center of the row, a substantially squareA cutting blade on the guard plate, means for clamping the blade on the guard plate, and a removable handle co-operating with said means for making the clamping of the blade effective.

6. A safety razor, comprising a subsi-an` tially square guard plate having on each of its edges a row of teeth including two sets disposed in opposite oblique directions to the center of the row and the teeth of all the rows disposed on downward inclines with their upper faces beveled also on downward h inclines toward their free ends, a substantially square cutting blade on the guard plate, means for clamping the blade on the guard plate, and a removable handle cooperating with said means for making the clamping of the blade effective.

7. A safety razor, comprising a substantiallysquare guard plate having on each of its edges a row of teeth including two sets disposed in opposite oblique directions to the center of the row, the guard plate having a central opening and also having an orifice between said central opening and each corner of the plate, a substantially square cutting blade on each guard plate, havin u an opening and orifices in register with t e opening y stantially square cutting blade and orifices of the guard plate, a clamping plate on the blade, having protruding mem- `bers removably extending through the registered openings and registered orifices of the blade and guard plate, and a handle-removably fastened to the end portion ofA the vprotruding member of the clamping plate ezlctending through the opening of the guard p ate.

8. A safety razor, comprising a substantially square guard plate having ony each of its edges a row of teeth including two sets disposed in opposite oblique directions to the center of the row and the teeth of all the yrows disposed on downward inclines with their upper faces also beveled on downward inclines toward their free ends, said guard plate having a central opening and also aving an orifice between the central opening and each corner of the plate, a subon each guard plate, having an opening and orifices in register with the opening and orifices of the guard plate, a clamping plate on the blade, having protruding members removablyrextending through the registered openings and registered orifices of the blade and guard plate, and a handle removably fastened to the end portion of the protruding member of the clamping plate extending through the opening of the guard plate.

This specification signed and witnessed this 27th day of October, A. D. 1925.

rHEoDoRE HOFFMAN, 

